PSI - Issue 53

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2022) 000–000

www.elsevier.com/locate/procedia

ScienceDirect

Procedia Structural Integrity 53 (2024) 119–128

© 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0 ) Peer-review under responsibility of the scientific committee of the ESIAM23 chairpersons Abstract With the Directed Energy Deposition (DED) process, we aim to develop an efficient way to reduce the use of bronze in worm gears. Due to the limited study conducted on the DED of bronze on steel substrate, optimizing the process parameters for a high quality deposition is essential. Therefore, in the current study, we evaluate the effect of process parameters such as laser power, feed rate, and scanning speed on the deposition of Bronze on a 42CrMo4V substrate. Single bronze tracks were deposited using different laser power values, feed rates, and scanning speed. Cross-sections of the depositions were analyzed for porosity and track dimensions to obtain the aspect ratio. The best parameters from the single-track deposition were selected, and multiple-layer deposition was created for a thickness of 3 mm. Cylindrical specimens were extracted from this multilayer deposition and subjected to wear tests using the pin-on-disc configuration under dry sliding conditions against a 42CrMo4V counterface to check for debonding and friction behavior. The DED specimens were characterized for porosity, microstructure, and microhardness. Finally, the results, when compared with the properties of wrought Bronze, indicate that the DED bronze can be used as a replacement for wrought Bronze in gears. © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license ( https://creativecommons.org/licenses/by-nc-nd/4.0 ) Peer-review under responsibility of the scientific committee of the ESIAM23 chairpersons Keywords: Direct Energy Deposition (DED); Bronze; Process parameters; Porosity; Wear Third European Conference on the Structural Integrity of Additively Manufactured Materials (ESIAM23) Development of DED Process Parameters for Deposition of Bronze and Evaluation of Its Wear Properties under Dry Sliding Conditions. Sunil Raghavendra a , Sasan Amirabdollahian b , Matteo Perini b , Marco Chemello c , Matteo Benedetti a* a Department of Industrial Engineering, University of Trento, Trento 38123, Italy b ProM Facility, Trentino Sviluppo S.p.A, Rovereto 38068, Italy c Sicor S.R.L, Rovereto 38068, Italy

* Corresponding author. Tel.: +39-046-128-2457 E-mail address: matteo.benedetti@unitn.it

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license ( https://creativecommons.org/licenses/by-nc-nd/4. 0 ) Peer-review under responsibility of the scientific committee of the ESIAM23 chairpersons

2452-3216 © 2023 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of the scientific committee of the ESIAM23 chairpersons 10.1016/j.prostr.2024.01.015